Adsorption characteristics of tetracycline on biochar from agricultural wastes

被引：2
|
作者：
Dai, Yingjie [1 ,2 ]
Liu, Mei [3 ]
Sun, Yue [2 ]
Li, Jingjing [2 ]
Jiang, Yue [4 ]
Li, Shanshan [2 ]
Yue, Wu [2 ]
Liu, Zhihua [2 ]
机构：
[1] Tianjin Key Lab Agroenvironm & Safe Prod, Minist Agr, Key Lab Original Agroenvironm Pollut Prevent & Co, 31 Fukang Rd, Tianjin 300191, Peoples R China
[2] Northeast Agr Univ, Coll Resources & Environm, Lab Environm Remediat, 600 Changjiang Rd, Harbin 150030, Heilongjiang, Peoples R China
[3] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, 18 Shuang Qing Rd, Beijing 100085, Peoples R China
[4] Tongji Univ, Coll Environm Sci & Engn, 1239 Siping Rd, Shanghai 200092, Peoples R China
来源：
DESALINATION AND WATER TREATMENT | 2019年 / 151卷
基金：
中国国家自然科学基金;
关键词：
Adsorption mechanism; Crop waste; Maximum adsorption capacity; Thermodynamic analyses; ACTIVATED CARBON; IONIC-STRENGTH; REMOVAL; ANTIBIOTICS; PH; MECHANISM; TEMPERATURE; PYROLYSIS; BEHAVIOR; SORPTION;
D O I：
10.5004/dwt.2019.23829
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The use of biochar prepared from waste crop straw for the removal of tetracycline (TC) in water has a profound influence on the protection of agricultural water environment. In this study, biochar (BC) was prepared from waste corn straw and wheat straw. The adsorption experiments were carried out on few factors: adsorption time, BC dosages, pH and ionic strength. The results showed that the adsorption of TC by BC derived from corn (C-BC) and BC derived from wheat (W-BC) fitted to the Langmuir model. The equilibrium time for adsorption of C-BC and W-BC was 60 min, the optimal amount of BCs dose was 10 g.L-1. The maximum saturated adsorption of TC by C-BC and W-BC were 49.56 and 42.12 mg.g(-1), respectively. The presence of Mg2+ hindered the adsorption of TC by BCs. The adsorption mechanism was analyzed from the perspective of adsorption kinetics, and both BCs were chemical adsorption. Research showed that biochar in the northeast is cheap and easy to obtain, and the adsorption efficiency was high. Therefore, the use of BC which prepared from corn straw and wheat straw to removal TC has broad prospect.
引用
收藏
页码：384 / 391
页数：8
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